Plants and filamentous fungi share with mammals enzymes responsible for DNA
methylation. in these organisms, DNA methylation is associated with gene s
ilencing and transposon control. However, plants and fungi differ from mamm
als in the genomic distribution, sequence specificity, and heritability of
methylation. We consider the rote that transposons play in establishing met
hylation patterns and the epigenetic consequences of their perturbation.